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See:
Description
Interface Summary | |
---|---|
FindProc | Interface to be used with Host.requestFindProc. |
HostRefreshBuilder | [Re-]build the information on the processes running on a host. |
Observer | Root Observer interface. |
ProcBlockObserver | An interface perform a one time check of all tasks while each is in the blocked state. |
ProcTasksObserver | An interface for clients to correctly know about all tasks of a Proc. |
TaskAttachedObserverXXX | Interface used to notify of a Task that has has been attached, and is about to resume execution in that state. |
TaskObserver | Observable events generated by a Task. |
TaskObserver.Cloned | Interface used to notify of Task clone events. |
TaskObserver.Code | Interface used to notify of a Task that the task's execution has reached a specific point in the code address space. |
TaskObserver.Execed | Interface used to notify of a Task exec (overlaying the process image with that of a new program). |
TaskObserver.Forked | Interface used to notify of Task forked (creating a new child process that contains one Task) events. |
TaskObserver.Instruction | Interface used to notify that a Task has executed a single instruction. |
TaskObserver.Signaled | Interface used to notify that a Task has a pending signal. |
TaskObserver.Syscalls | Interface used to notify of a Task either entering, or exiting a system call. |
TaskObserver.Terminated | Interface used to notify that Task has terminated (the task no longer exits). |
TaskObserver.Terminating | Interface used to notify of a Task that is terminating. |
TaskObserver.Watch |
Class Summary | |
---|---|
Action | An Observer return this Action to indicate what should
happen next. |
Auxv | |
Environ | The environment vector. |
Host | A host machine. |
Manager | Manager of all operations within the proc model. |
MemoryMap | Represent a memory map as modelled in /proc/$$/maps. |
Observable | Observable element of the proc model. |
Observation | The binding between an Observer and its Observable. |
Proc | A UNIX Process, containing tasks, memory, ... |
ProcBlockAction | This class blocks all of the threads in a process and performs a given action defined by the method existingTask(Task task) on each task. |
ProcEvent | |
ProcEventObservable | |
ProcTasksAction | Provides a mechanism for tracing all clone events within a process. |
Task | |
TaskEvent |
This package implements frysk's process model of the target system.
Host
), processes
(Proc
), and tasks (Task
, a.k.a., threads).
Frysk provides both behavioral and relational views of that model.
The following sections describe each of those views.
Process 1 forms the root of the process tree.
The tasks, within a process, form a simple two level tree:
Methods for iterating over, and searching for, a host's process and tasks are provided.
The process model can also be viewed as a collection of independent state-machines. Each state-machine instance tracks the state of the corresponding host, process, or task.
For instance, a process(or Proc
object) has the
following states:
The client manipulates a state-machine instance by sending it request messages. The state-machine, in turn, notifies interested client of state transitions that result from these requests, and other asynchronous events, using observers.
Finally, the individual state-machine uses internal messages to co-ordinate the systems overall state.
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